Wheel
70To invent a wheel
Alphabet
70To invent the principle of the alphabet
Windmill
70To invent the Windmill
Gunpowder
80To invent the Gunpowder
To invent a Printed Books
Compass
80To invent the Compass
Steam Engine
80To invent the Steam Engine
To invent an Electric Light
To invent a Wireless Communication
Penicillin
90To invent a Penicillin
Transistor
100To invent the First Transistor
To invent the Global Internet